Must be an antenna issue, or they were off the air for a bit but 25.6 was fine at 4am for a recording and is fine now, South of you in Burnsville. I also get the 41s all the time, both with my 4228 8-bay attic antenna.
I live in Bloomington and just rescanned stations on my TV. The 25-x stations are no longer there, but all of a sudden the 41-x stations showed up.
Atmospheric conditions in the summer time (when the sun is at a higher angle and the clouds are more dense with moisture) make the low-power stations fade in and out, especially, if you have fringe reception on those low power stations.